Steam-trap.



PATENTBD JULY 25, 1905.

F. A. WALDRON.

STEAM TRAP.

APPLIOATION FILED AUG. 1e. 1904.

lf P Llh. LLL.. convoco@ OQOOO. 000900@ -Mmm NITED STATES PATENT OFFICE.

i STEAM-TRAP.

Specification of Letters Patent.

Patented July 25, 1905.

Application tied August 16,1904. seria No. 220,951.

lo a/ZZ whom it may concern/.-

Be it known that I, FREDERICK A. WAL- DRoN, a resident of Stamford, inthe county of Fairfield and State of Connecticut, have invented certainnew and useful Improvements in Steam-Traps; and I do hereby declare thefollowing to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to which it appertains tomake and use the same. Y

My invention relates to an improved steamtrap, theobject of theinvention being to provide an improved steam-trap of such constructionas to overcome the defects in steam-traps heretofore known and obtainpermanent and satisfactory results whether thereis a full head of steamon the same or no pressure upon it; and the invention consists incertain novel features of construction and combinationsand arrangementsof parts, as will be more fully hereinafter described, and pointed outin the claims.

In the accompanying drawings, Figure 1 is a view in section,illustrating my improvements; and Fig. 2 is adetached view of thestrainer.

1 represents a casting having a duct 2, with which a pipe 22communicates, and a valvechamber 4 is removably secured to said casting'by bolts 4. A strainer 5 is screwed into the valve-chamber 4, and itsinner end fits snugly in a seat at the end of duct 2, compelling allsteam and water entering the valvechamber to first pass through strainer5 and all foreign matter removed that might interfere with the perfectoperation of the valves. In the lower portion of valve-chamber 4 a valve6 is mounted and normally held against a seat 7 This valve 6 has acylindrical bore in which a cylindrical auxiliary 8 is located andsecured on a stem 9, which projects through casting l, across an openspace, into a sleeve 10, mounted in a wall 11, and the outer end of thestem 9 is screw-threaded to receive large adjusting-nuts 12 to adjustthestem in the sleeve to regulate the operation of the valves. Valve 6is provided with ducts 13, normally closed byl auxiliary valve 8, andisprovided with a cross-pin 14, located in a recessed or contractedportion 15 of auxiliary valve 8 and adapted to engage and move the valve6 by the auxiliary valve 8 when the latter moves a certain distance.

The upper end of casting 1 is made with an outwardly-projecting arm 16,having an elongated vertical head 17, provided with three (more or less)openings 18, in any one of which a lever 19 may be pivotally secured bya bolt 2O tovary the are of movement of the lever. The lower end of thislever 19 is bifurcated and secured to a cross-head on sleeve 10, and theupper portion of the lever is also bifurcated, permitting its freemovement. A brass pipe 22 of the desired length projects through thebifurcated upper portion of lever 19 and connects the duct 2 with thesteam-passage, and a coupling 23 is located ron this pipe 22 andconnected at opposite sides by rods 24 with the lever, the ends of saidrods being screw-threaded and provided with nuts 25 at opposite sides ofthe lugs on the coupling and lever through which the rods pass to adjustthe rods asmay be found desirable.

The operation of my improvements is as follows: As the brass pipe 22fills with water from the condensed steam the temperature of the pipefalls and causes the same to contract, which contraction through themedium of rods 24 moves lever 19 to the left, causing stem 9 to moveinward and cause auxiliaryvalve 8 to move in valve 6 far enough to openports or ducts 18 and permit the water to be driven out bythe'pressureof the steam. Should, however, there be nothing but water in pipe 22 andnot sufficient pressure to eject the proper quantity of water throughports 13, the auxiliary valve8 is moved by further contraction of pipe22 until it engages the crosspin 14 and moves valve 6 from its seat,per-v mitting free escape of the water. As the water is expelled andpipe 22 fills with steam the pipe will expand and one or both valveswill be closed by the movement of lever 19 to the right, as will bereadily understood.

' A great many slight changes might be made in the general form andarrangement of the parts described without departing from my invention,and hence I would have it understood that I do not restrict myself tothe precise details set forth, but consider myself at liberty to makesuch slight changes and alterations as fairly fall within the spirit andscope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a steam-trap, the combination with a valve-chamber, of a valvetherein, an auxiliary valve in said chamber constructed to partiallyopen the water-outlet, and thermostatic means controlling the movementof the auxiliary valve which latter controls the movement ofthe mainvalve to fully 'open the water-outlet.

2. In a steam-trap, the combination with a valve-chamber of a valvetherein normally closing the Water-outlet, an auxiliary valve withinsaid main valve for partially opening the water-outlet, and thermostaticmeans controlling the movement of the auxiliary valve` which lattercontrols the movement of the main valve.

3. In a steam-trap, the combination with a valve-chamber` of a valvetherein having a cylindrical bore and ducts in its side Wall, acylindrical auxiliary valve in the main valve adapted to open and closesaid ducts, a stem on the auxiliary valve, and thermostatic means tomove said stem and auxiliary valve to opensaid ducts and move themainvalve when the auxiliary valve is moved beyond a predetermined point.

4. In a steam-trap, the combination With a valve-chamber, of a valvetherein having a cylindrical bore, and ducts in its side Wall, acylindrical auxiliary valve in the main valve adapted to open and closesaid ducts, a crosspin in the main Valve projecting through a recess orcontracted portion of the auxiliary valve to compel the latter to movethe main valve after its initial movement in opening the ducts, andthermostatic means controlling` the movement of said auxiliary valve.

5. In a steam-trap, the combination With a valve-chamber, of a valvetherein having a cylindrical bore, and ports or ducts in its side Wall,an auxiliary valve in said main valve adapted to open and close saidducts or ports mees and move the main valve, a stem on said auxiliaryvalve, a sleeve to receive said stem, nuts on the screw-threaded end ofthe stem to adjust the valve-stem and sleeve, a lever pivoted at one endand connected at its other end with said sleeve, a brass pipe conveyingcondensed steam to the valve-chamber, and rods adjustably connecting thepipe with the lever to compel and multiply the movement of the latofsaidvalves, a 'pipe conveyingcondensed steam to said duct, and; rodslconnecting the pipe with the lever to compel and multiply the movementof the latter as the pipe expands and contracts due to theabsence orpresence of condensed steam and the temperature thereof.

In testimony whereof I have signed this specification in the presence oftwo subscribing wltnesses.

FREDERICK A. WALDRON.

Vitnesses:

CYRUS F. RAYMOND, CHARLES A. ANDERSON.

